应用连续退火模拟机研究了连续退火工艺各个参数对超低碳烘烤硬化钢板烘烤硬化性能的影响。试验结果表明:提高退火温度可增加NbC的回溶量,而且晶粒尺寸增大使碳原子的晶界偏聚量减少,从而提高了钢板的烘烤硬化性能;提高缓冷段冷速能减少NbC析出,有利于烘烤硬化性能的提高;快冷段冷速和过时效温度对烘烤硬化性能均无明显影响;提高过时效后冷速使碳原子向晶界偏聚的时间缩短,对于提高烘烤硬化性能也是有利的。 The effect of continuous annealing process parameters on the bake hardening properties of ultra-low carbon bake hardened steel sheets was studied by continuous annealing simulator. The results show that increasing the annealing temperature can increase the amount of NbC, and the increase of the grain size reduces the segregation of the carbon atoms in the grain boundary so as to improve the bake hardenability. Increasing the cooling rate in the slow cooling zone can reduce the NbC Precipitation is conducive to improve the bake curing properties; fast cooling section and over-aging temperature bake hardenability had no significant effect; to improve the cooling rate after over-aging carbon atoms to the grain boundary segregation time is shortened, to improve Bake hardening properties are also advantageous.